麻烦前辈帮我看一下这个程序~

[cquptzy8522065]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace p3_7
{
class Program
{
static void Main(string[] args)
{
BankCard c1 = new BankCard() { id = "001", money = 500 };
EditCard(c1);
c1.Query();
ChangeCard(ref c1);
c1.Query();
}
static void EditCard(BankCard c)
{
c.money = 1000;
c = new BankCard() { id = "002" };
}
static void ChangeCard(ref BankCard c)
{
c = new BankCard() { id = "002" };
}
}
class BankCard
{
public string id;
public decimal money=0;
public void Query()
{
Console.WriteLine("卡号{0} 余额{1}",id,money);


}
}
}


请问这个程序为什么结果是卡号001 然后金额是1000而不是500.。。
哪一句程序将值换了，谢谢大家了！

[cquptzy8522065]

前辈们好厉害~谢谢了

[MSDNXGH]

EditCard(c1);

static void EditCard(BankCard c)
{
c.money = 1000;
c = new BankCard() { id = "002" };
}

[cancerser]

BankCard c1 = new BankCard() { id = "001", money = 500 };
↓
c1--> BankCard0{ id = "001", money = 500 } 地址0001

——————————————————————————————————
EditCard(c1)
↓
c1--> BankCard0{ id = "001", money = 500 } 地址0001
c --> BankCard0{ id = "001", money = 500 } 地址0001

c.money = 1000;
↓
c1--> BankCard0{ id = "001", money = 1000} 地址0001
c --> BankCard0{ id = "001", money = 1000} 地址0001

c = new BankCard() { id = "002" };
↓
c1--> BankCard0{ id = "001", money = 1000} 地址0001
c --> BankCard1{ id = "002"} 地址0002

[烟波钓]

第一行 卡号c1 余额1000
第二行 卡号c2 金额0

[EnForGrass]

[Quote=引用 2 楼 cancerser 的回复:]

BankCard c1 = new BankCard() { id = "001", money = 500 };
↓
c1--> BankCard0{ id = "001", money = 500 } 地址0001

——————————————————————————————————
EditCard(c1)
↓
c1--> BankCard0{ id = "001", ……
[/Quote]
详细，

[cjlu98]

地址 未变 大神指针学的好啊